Filter
Top Products
40
Electrical
System
Tractors
,
Lawn
and
Garden
-
110
and
112
10-2
Igniti
on
System
SM-2059-(Apr-67)
SPARK
PLUG-Continued
CONDENSER
Fig,
2-
Spork Plu g
Spark
plugs
must
operate
within
a
certain
temperature
rang
'e
to
give
good
performan
c e.
The
ability
of
the
spark
plug
to
conduct
heat
away
from
the
center
electrode
and
its
insulating
ma-
terial
is
controlled
by
the
design
of
the
shell
and
insulator.
The
path
for
heat
escape
is
through
the
insulating
material,
the
plug
shell,
the
ga
sket
and
threads
to
the
cylinder
head.
By
varying
the
construction
of
the
insulator,
the
spark
plug
manuf
ac
turer
is
able
to
produce
spark
plugs
of
different
heat
dissipating
characterist
cs .
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r'ITACT
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S TRUCTI ON
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r
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l
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Fi
g.
3-
Cutaw
oy
Vi
ew
of
CO
ll
denser
When
the
ma
g
neti
c
field
in
the
coil
collapses,
voltage
much
higher
than
the
original
volt
age
is
induced
into
the
primary
winding.
As
th
e
breaker
points
open,
the
current
tends
to
continue
flowing
across
the
pOints.
The
resulting
arc
would
damage
the
points
in
a
short
time.
The
condenser,
by
absorbing
the
sur
ge of
high-voltage,
dampens
the
tendency
of
curr
e
nt
to
arc
across
the
points.
The
condenser
also
allows
the
magnetic
field
to
collapse
rapidly
which
contributes
to
high-volt-
age
induced
into
the
secondary
windin
g
s.
A
condenser
with
too
low
a
capacity
will
cause
arcin
g
and
burnin
g of
ignition
points.
Litho
in
U.
S
.A.